K.R.
I only have two kids, but I am imagining how busy your life is about to become! My "child development education" answer would be: switch rooms now, and then take away all pacifiers BEFORE baby comes. And my "tired mom just trying to get through the next year in one piece" answer is: switch rooms now and let everyone keep their pacifiers until they are well adjusted to the baby (this will take at least four months). Lay down WITH the kids and have family nap time wherever, whenever - just get some sleep! (unless the paci is actually causing speech delays or teeth malformation that can't be easily corrected - this is rarely the case)